Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Patent
1998-03-06
2000-09-26
Gupta, Yogendra
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
556 12, 556 30, 556 52, 556 64, 568 12, 106901, 526 90, 502152, 502117, 502162, 502158, C07F 1500, C07F 902
Patent
active
061244872
ABSTRACT:
A new family of metallacycles, which are preferably zirconacycles, is characterized by having a unique halogenated substituent. The metallacycles are useful for the preparation of main group heterocycles, especially two novel families of heterocycles. The first new family of heterocycles preferably contains a halosilyl substituent. A preferred group of the second family of novel heterocycles contains a silyl group having a leaving group bonded thereto. The preferred group of these heterocycles is suitable for preparing novel organometallic complexes having a bridged bidentate heterocyclic ligand. These novel organometallic complexes may be used as catalyst components in olefin polymerization. The subject catalyst components are particularly well suited for use in the medium pressure solution process to prepare linear low density polyethylene.
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Brown Stephen John
Gao Xiaoliang
Harrison Daryll G.
Koch Linda
Spence Rupert Edward von Haken
Boyer Charles
Gupta Yogendra
Johnson Kenneth H.
NOVA Chemicals (International ) S.A.
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